Beijing North Branch letter Supply of electromagnetic flowmeter

 XK-LED intelligent electromagnetic flowmeter consists of two parts, the sensor and converter. It is based on the work of Faraday's law of electromagnetic induction, used to measure the conductivity is greater than 5μS / cm conductive liquid volumetric flow rate, is a measure of the volume flow of conductive medium for induction meter. In addition to measure the volume flow of conductive liquid, it can also be used to measure the volume flow of homogeneous liquid-solid two-phase liquid suspension of acid and alkali and other strong corrosive liquids and slurries, pulp and paper pulp. Widely used in flow measurement in petroleum, chemical, metallurgy, textile, paper making, environmental protection, food industry and municipal administration, water conservancy construction, river dredging and other areas. Second, the principle according to Faraday's principle of electromagnetic induction, the measuring tube axis and the magnetic field lines perpendicular to the wall to install a pair of detecting electrodes, when the conductive liquid tube axis motion along the measurement, the conductive liquid cutting magnetic field lines generated EMF, this induction the potential detected by the two detection electrodes, the numerical size is proportional to the flow rate, which is: E = KBVD formula: E- EMF; K- and field distribution and axial length of the relevant factors; B- magnetic induction; V - the average velocity of the conductive liquid; D- electrode spacing; (measuring tube inner diameter) E EMF sensor as traffic signals, transmitted to the converter, amplified, transform filtering with a series of digital processing, with a backlit dot matrix LCD instantaneous flow rate and cumulative flow. The converter has 4 ~ 20mA output, alarm output and frequency output and a RS-485 communication interface, etc., and supports HART and MODBUS protocol. Third, the instrument characteristics ■ All digital processing, anti-interference ability, reliable measurement, high accuracy flow measurement range up to 150: 1; ■ Ultra-low EMI switching power supply for power supply voltage range, anti-EMI performance; ■ 16-bit embedded microprocessors, computing speed, high precision, programmable low-frequency square wave excitation frequency and improve the stability of flow measurement, low power consumption; ■ using SMD devices and surface mount (SMT) technology, circuit reliability high; ■ no moving parts inside the pipe, unimpeded flow of parts, measuring almost no additional pressure loss; ■ at the scene according to actual needs of users online range; ■ measurements and velocity distribution, fluid pressure, temperature, density, viscosity and other physical parameters; ■ High-resolution backlit LCD display, full Chinese menu operation, easy to use, simple to operate, easy to learn; ■ has RS485, RS232, Hart, and Modbus and other digital communication signals; (optional) ■ with self inspection and self-diagnostic function; total ■ hour meter record function, in hours of total traffic records for hourly metering system (optional); ■ has three internal totalizer can show a positive cumulative amount of anti- and the cumulative amount of the difference between the volume totalizer, with internal clock does not power down, can record 16 power-down time. (Optional); ■ Infrared handheld operator, 115KHZ communication speed, long-distance non-contact operation of all functions of the converter (optional). Technical Data Sheet 1 Nominal Diameter (mm) (special specifications can be customized) pipeline tetrafluoroethylene lining: DN10 ~ DN600 pipeline rubber lining: DN40 ~ DN2200 flow direction of the positive and negative net flow turndown ratio 150: 1 Repeatability error measurement ± 0.1% of accuracy class Pipeline: 0.5, 1.0 measured medium temperature ordinary rubber lining: -20 ~ + 60 ℃ high temperature rubber lining: -20 ~ + 90 ℃ PTFE lining: -30 ~ + 100 ℃ high temperature Type tetrafluoroethylene lining: -20 ~ + 180 ℃ Rated working pressure (hypertension can be customized) DN10-DN150: ≤1.6MPa DN200-DN350: ≤1.0MPa DN400-DN1000: ≤0.6MPa DN450-DN2200: ≤0.25MPa velocity range 0.1 15m / s Conductivity range measured fluid conductivity ≥5μs / cm signal output 4 ~ 20mA (load resistance 0 ~ 750Ω), pulse / frequency control level communication output RS485, MODBUS protocol, HART protocol AC220V or DC24V power supply requirements straight pipe flange connection between both length upstream ≥5DN, downstream ≥2DN connection meter and piping, flanges meet the national standard: GB / T9115.1-2000 Explosion levels ExdeiallBT4-T6 Protection class IP65, special order up up to IP68 Ambient temperature -25 ~ + 60 ℃ relative humidity of 5% to 95% of the total power consumption of less than 20W